package cn.com.scau.tstjxt.servlet;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import cn.com.scau.tstjxt.dao.Tuser;

public class LoginFilter extends HttpServlet implements Filter {

	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;

	@Override
	public void doFilter(ServletRequest req, ServletResponse res,
			FilterChain chain) throws IOException, ServletException {
		try {
			HttpServletRequest request = (HttpServletRequest) req;
			HttpServletResponse response = (HttpServletResponse) res;
			HttpSession session = request.getSession();
			String path = "http://" + request.getServerName() + ":"
					+ request.getServerPort() + request.getContextPath();
			Tuser user = (Tuser) session.getAttribute("user");
			if (user == null) {
				path = path + "/homepage/Login.jsp";
				response.sendRedirect(path);
				return;
			}

		} catch (Exception e) {
			e.printStackTrace();
		}
		chain.doFilter(req, res);
	}

	public void init(FilterConfig arg0) throws ServletException {
		// TODO Auto-generated method stub

	}

	public void destroy() {
		super.destroy();
	}

}
